An air dryer, also known as a compressed air dryer, is a machine that works in conjunction with an air pump or air compressor. Typically, compressed air produced through the compression process contains moisture. Air dryers are designed to reduce the amount of water and humidity mixed in the compressed air system. They achieve this by causing the moisture to condense, either through refrigeration using a refrigerant or by absorbing it with desiccant beads, and then draining the water out before the compressed air is used in production processes. This results in high-quality, dry, and pure air.